Dr. Ph. Martin's Hydrus fine art watercolor is lightfast, transparent, fine art quality watercolor. This liquid product delivers the same brilliance and permanency as traditional tube watercolors. Made from the finest artist pigments, Dr. Ph. Martin's Hydrus fine art watercolor can be blended and intermixed while still maintaining the transparency and luminosity of the colors. Each set comes in a tray that doubles as a mixing palette and bottle holder, with space for a water cup and six mixing wells. Great for use in technical, calligraphy, fountain pens, and in airbrushes. Each set includes 12 different colors in 0.5 oz (15 ml) plastic bottles with droppers and a custom mixing palette. Set 2 colors: 13H hansa deep yellow,14H yellow ochre,15H permanent red,16H cobalt blue,17H Indian red,18H viridian green,19H burnt sienna, 20H alizarin crimson, 21H sepia,22H Payne's gray,22H Payne's gray,23H sap green, 24H burnt umber.